Subtracting multiples of 10 from 3-digit numbers
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Lesson details
Key learning points
- In this lesson, we will use known number facts in order to mentally subtract multiples of 10 from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental subtraction more efficient.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
Which one of these is a 3 digit number?
19
34
78
Q2.
674 + 20 =
1000
664
684
Q3.
654 + 30 = 694 True or false?
True
Q4.
520 + 80 =
580
700
800
Q5.
666 + 50 =
1000
675
676
5 Questions
Q1.
When we subtract the number we started with gets...
bigger
Q2.
356 - 40 = 326 True or false?
True
Q3.
673 - 60 =
623
633
666
Q4.
532 - 40 =
482
502
600
Q5.
300 - 60 =
320
360
440